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Drug Detection Periods

The following chart gives approximate detection periods for each substance by test type.  The detection windows depend upon multiple factors—drug class, amount and frequency of use, metabolic rate, body mass, age, overall health, and urine pH. For ease of use, the detection times of metabolites have been incorporated into each parent drug. For example, heroin and cocaine can only be detected for a few hours after use, but their metabolites can be detected for several days in urine. In this type of situation, we will report the (longer) detection times of the metabolites.

Oral fluid or saliva testing results for the most part mimic that of blood. The only exceptions are THC (tetrahyrocannabinol) and benzodiazepines. Oral fluid will likely detect THC from ingestion up to a maximum period of 6–12 hours. This continues to cause difficulty in oral fluid detection of THC and benzodiazepines.

Drug Type

Alcohol



Amphetamine

Methamphetamine

Ecstasy (MDMA)

Barbiturates

Benzodiazepines


Marijuana (THC)


Cocaine

Codeine

Cotinine (Nicotine)

Morphine

Tricyclic Antidepressants

Methadone

PCP 
Urine

6 to 24 Hours 
Note: IEG Alcohol Lab Tests can stay in urine for up to 80 hours

1 to 4 days

3 to 5 days

72 to 96 hours

1 day

7 days, Chronic user up to 6 weeks

4 days, Chronic user up to 6 weeks

2 to 5 days

2 to 3 days

2 to 4 days

2 to 4 days

7 to 10 days


7 to 30 days

7 days, Chronic user up to 30 days
Hair

up to 2 days



up to 90 days

up to 90 days

up to 90 days

up to 90 days

up to 90 days


up to 90 days


up to 90 days

up to 90 days

up to 90 days

up to 90 days

undetectable


up to 90 days

up to 90 days
Oral Fluid / Blood

12 to 24 hours



12 hours

1 to 3 days

72 to 96 hours

1 to 2 days

6 to 48 hours

2 days in blood 
may only be detectable in saliva/oral fluid for 2–24 hours in most cases.
2 to 5 days

2 to 5 days

2 to 4 days

1 to 3 days

undetectable in small doses

24 hours

1 to 3 days
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